The end-Permian mass extinction, ∼252 million years ago, is notable for a complex recovery period of ∼5 Myr. Widespread euxinic (anoxic and sulfidic) oceanic conditions have been proposed as both extinction mechanism and explanation for the protracted recovery period, yet the vertical distribution of anoxia in the water column and its temporal dynamics through this time period are poorly constr...

The voluminous Triassic magmatism within the Lhasa Terrane, Tibetan Plateau, has been studied for decades yet petrogenesis of magmas involved and tectonic setting this associated events remain uncertain. This study presents new zircon U–Pb geochronological, Lu–Hf isotopic, whole-rock geochemical data Middle volcanic rocks southern region terrane. Zircon dating three samples from area yield cons...

The co-existence of Cretaceous adakitic and A-type granitoids in southern Tibet can offer fundamental constraints on subduction the Neo-Tethyan oceanic plate associated crustal growth processes, if their petrogenetic relationships are understood. Here, we report whole-rock geochemistry, zircon U-Pb geochronology, situ Hf isotopes trace elements from Chanang intrusive suite, including Zeyu Cuoji...

[1] A >500-km-long east-west trending metamorphic belt in the Qiangtang terrane of central Tibet consists of tectonic melange that occurs in the footwalls of Late Triassic–Early Jurassic domal low-angle normal faults. The melange is comprised of a strongly deformed matrix of metasedimentary and mafic schists that encloses lesser-deformed blocks of metabasites, Carboniferous–Triassic metasedimen...

The most spectacular example of a plate convergence event on Earth is the motion of the Indian plate towards Eurasia at speeds in excess of 18 cmyr−1 (ref. 1), and the subsequent collision. Continental buoyancy usually stalls subduction shortly after collision, as is seen in most sections of the Alpine–Himalayan chain. However, in the Indian section of this chain, plate velocities were merely r...

Abstract Subduction of oceanic lithosphere is a diagnostic characteristic plate tectonics. However, the geodynamic processes from initiation to termination subduction zones remain enigmatic mainly due scarcity appropriate rock records. We report first discovery early Paleozoic boninitic blueschists and associated greenschists eastern Proto-Tethyan North Qilian orogenic belt, northeastern Tibet,...